Heater works few minutes then stops. Display

[94olds88]

Hi

94 Olds 88. Great car. Good as can be even with 201K but now the cold weather has arrived the following problem has appeared.

I set the temperature on the panel to where the heater kicks in.....it blows hot for a few minutes then I hear a relay type click sound under the dash on the passenger side, the heater blows cold even with the temp set to 90 deg...and the temperature LED display starts flashing.
( but the a/c does not kick in) I then switch engine off....wait a few minutes.. start up again....display normal...heater works for a few minutes then the problem reoccurs.

Anybody out there any ideas....the engine temp is in the mid green and the pipes into the heater are hot.

Thanks in advance. I live a long way from the Olds shop and its getting cold here.

Phil

[kmartkid200274]

i have an 82 88royale and the heat went on when the a/c people checked it out they found that the heater core in the firewall had gone bad and needed to be replaced. This might be your problem as well. good luck